background and objectives: septoria tritici blotch (stb), caused by mycosphaerella graminicola (anamorph s. tritici) is currently the most serious disease of wheat worldwide. this study was established to determine the function of resistant genes of m. graminicola to find out the number of genes corresponding in resistant reaction and also to estimate the genetic parameters of resistance. mater...

The line value of a genotype is defined as the expected value of all lines that can be derived from this genotype. Specific genetic effects are defined for this value: only additive and additive by additive epistatic effects are necessary. There is no dominance effect for such a value. A general expression for the covariances between related lines is given. From a design with several lines per ...

HE dominant favorable gene hypothesis, first proposed by BRUCE (1910), T attributes heterosis to accumulated effects of loci at which the more favorable allele contributed by one parent is manifest rather than the unfavorable allele contributed by the other parent. The concepts of linkage (JONES 191 7) and large number of loci (COLLINS 1921; SINGLETON 1941) make the hypothesis compatible with t...

I N 1918, FISHER described the genotypic variance as consisting of additive genetic, dominance, and epistatic components. This model was later extended by FISHER, IMMER, and TEDIN (1932) to include the action of any number of genes in the absence of epistasis. WRIGHT (1935) presented a model dealing with epistatic effects of loci in pairs, as has GRIFFING (1950) in a constant parent regression ...

The Fisher’s infinitesimal model is traditionally used in quantitative genetics and genomic selection, it attributes most genetic variance to additive variance. Recently, the dominance maximization was proposed prioritizes based on alternative parameterizations. In this model, effects at locus level are introduced into after maximized. study, new parameterizations of selection were evaluated co...

We established a genomic model of quantitative trait with genomic additive and dominance relationships that parallels the traditional quantitative genetics model, which partitions a genotypic value as breeding value plus dominance deviation and calculates additive and dominance relationships using pedigree information. Based on this genomic model, two sets of computationally complementary but m...

The objective of this study was to estimate heritability, heterosis, and genetic parameters involved in the control of forage yield and quality in kenaf populations, using analysis of generation means. Two crosses were used; Cuba 2032×Accession 75-71 and IX51×Everglade 41. Experimental material comprised of P1 and P2, their F1 and F2 and BC1P1 and BC1P2 generations. The effects of generations w...